CN106321307A - Fuel injector and control valve thereof - Google Patents
Fuel injector and control valve thereof Download PDFInfo
- Publication number
- CN106321307A CN106321307A CN201510387784.2A CN201510387784A CN106321307A CN 106321307 A CN106321307 A CN 106321307A CN 201510387784 A CN201510387784 A CN 201510387784A CN 106321307 A CN106321307 A CN 106321307A
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- China
- Prior art keywords
- valve
- spool
- control valve
- longitudinal center
- center axis
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 239000000446 fuel Substances 0.000 title claims abstract description 30
- 238000002347 injection Methods 0.000 claims abstract description 43
- 239000007924 injection Substances 0.000 claims abstract description 43
- 230000009471 action Effects 0.000 claims description 9
- 230000007246 mechanism Effects 0.000 claims description 6
- 230000009467 reduction Effects 0.000 claims description 6
- 239000007921 spray Substances 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 4
- 238000011065 in-situ storage Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 239000000295 fuel oil Substances 0.000 description 11
- 239000003921 oil Substances 0.000 description 10
- 230000003628 erosive effect Effects 0.000 description 8
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 238000005260 corrosion Methods 0.000 description 5
- 230000007797 corrosion Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 238000009825 accumulation Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 4
- 238000010168 coupling process Methods 0.000 description 4
- 238000005859 coupling reaction Methods 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- 230000003068 static effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000010009 beating Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000004899 motility Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M47/00—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure
- F02M47/02—Fuel-injection apparatus operated cyclically with fuel-injection valves actuated by fluid pressure of accumulator-injector type, i.e. having fuel pressure of accumulator tending to open, and fuel pressure in other chamber tending to close, injection valves and having means for periodically releasing that closing pressure
- F02M47/027—Electrically actuated valves draining the chamber to release the closing pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
- F02M63/0012—Valves
- F02M63/0031—Valves characterized by the type of valves, e.g. special valve member details, valve seat details, valve housing details
- F02M63/0033—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat
- F02M63/0036—Lift valves, i.e. having a valve member that moves perpendicularly to the plane of the valve seat with spherical or partly spherical shaped valve member ends
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
- F02M2200/05—Fuel-injection apparatus having means for preventing corrosion
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Fuel-Injection Apparatus (AREA)
Abstract
The invention discloses a fuel injector and a control valve thereof. The control valve comprises a valve seat, a valve element and a retaining block, wherein a valve seat surface and a valve hole penetrating through the center of the valve seat surface longitudinally are defined in the valve seat; the valve hole and the valve seat surface define a longitudinal central axis; the valve hole communicates with an injection valve of the fuel injector; the valve element is constructed to be suitable for moving between a valve closing position and a valve opening position along the longitudinal central axis; in the valve closing position, the valve element makes contact with the valve seat in a matched mode to close the valve hole, and in the valve opening position, the valve element leaves the valve seat to opening the valve hole; and the retaining block is provided with a containing groove used for retaining the valve element. The valve element is a rotary body with the longitudinal central axis as the rotation center. The longitudinal section of the valve element including the longitudinal central axis is noncircular so that the valve element can rotate around the longitudinal central axis, but cannot rotate around any transverse central axis perpendicular to the longitudinal central axis.
Description
Technical field
The application relates to a kind of control valve being used in fuel injector, and comprises this control valve
Fuel injector, especially co-rail ejector.
Background technology
Fuel injector generally comprises control valve and injection valve, is controlled by the open and-shut mode of control valve
The oil spout action of injection valve.Fig. 1 schematically illustrates a kind of partial structurtes of control valve, this control
Valve includes valve seat 1, and it is formed with valve opening 2 and valve seat 3；The spool 4 of spheroidal, itself and valve seat
3 coordinate and realize the opening and closing of valve opening 2；Maintainance block 5, it accommodates a part for spool 4,
And it is used for shifting spool 4 onto the position of close valve orifice 2.Valve opening 2, spool 4, maintainance block 5 edge
The central axis Z of the longitudinal extension of control valve arranges.When by maintainance block 5, spool 4 being pushed against in valve
During seat surface 3, it is achieved the fuel oil pressure accumulation in injection valve.After disappearing from the thrust of maintainance block 5, valve
Core 4 can be lifted off a seat face 3, and a part for the fuel oil in injection valve, in valve opening 2 inflow control valve, makes
Obtain in injection valve and occur that pressure reduction realizes the oil spout action of injection valve.
When valve opening 2 is opened, spool 4 is by the fuel oil from injection valve through valve opening 2 introducing
Impact.Therefore, in life-time service, as in figure 2 it is shown, the position of the facing valve opening 2 of spool 4
It may happen that erosion and produce cavitation corrosion position 6.Owing to spool 4 is rounded, therefore can be relative to guarantor
Hold block 5 the slowest around longitudinal center axis Z and the axis of pitch vertical with longitudinal center axis Z
Ground rotates, as shown by the arrow.When cavitation corrosion position 6 turns to the position facing to valve seat 3
Time, as it is shown on figure 3, spool 4 cannot be effectively sealing off valve opening 2.This can make can not in injection valve
Realize fuel oil pressure accumulation, thus cause fuel injector fault.
Summary of the invention
The purpose of the application is to make improvements fuel injector, be mitigated or eliminated in prior art because of
The foregoing problems that spool erosion brings.
An aspect according to the application, it is provided that a kind of control valve being used in fuel injector, bag
Including: valve seat, it limits valve seat and the valve opening along longitudinal break-through valve seat center, described valve opening and
Valve seat limits longitudinal center's axis, and described valve opening communicates with the injection valve of fuel injector；
Spool, it is configured to be suitable to move between valve closing position and valve opening position along described longitudinal center axis
Dynamic, in valve closing position, spool contacts with valve seat and coordinates and close valve orifice, in valve opening position, spool from
Valve opening seat and open valve opening；And maintainance block, it has tank, in order to keep spool；Wherein, valve
Core is the revolving body with described longitudinal center axis as the centre of gyration, and it is comprising described vertical central axis
In non-circular in the longitudinal section of line, so that spool can be around described central longitudinal axis, but can not
Rotate around any central transverse axis vertical with described longitudinal center axis.
According to a kind of embodiments possible of the application, described spool includes being contained in described tank
Part I and the Part II exposed from maintainance block, and joined by the shape of Part I with tank
Conjunction makes the spool can be around described central longitudinal axis.
According to a kind of embodiments possible of the application, also by the shape of described Part I Yu tank
Coordinate and spool can not be rotated around any central transverse axis vertical with described longitudinal center axis.
According to a kind of embodiments possible of the application, by the shape of described Part II Yu valve seat
Coordinate and spool can not be rotated around any central transverse axis vertical with described longitudinal center axis.
According to a kind of embodiments possible of the application, described spool is spheroid, has along described vertical
To the short radius of central axis and along the central transverse axis direction vertical with described longitudinal center axis
Major radius.
According to a kind of embodiments possible of the application, described control valve also includes force application mechanism, is used for
Optionally apply thrust to maintainance block, to move to valve closing position by maintainance block band movable valve plug.
According to a kind of embodiments possible of the application, described control valve also includes resetting-mechanism, is used for
Force application mechanism is made to return to along the direction contrary with its force direction in situ.
According to a kind of embodiments possible of the application, by the height in the injection valve pocket introduced by valve opening
Compression ignition oil shifts spool onto valve opening position from valve closing position.
According to further aspect of the application, it is provided that a kind of fuel injector, especially common rail injection
Device, including foregoing control valve；And the injection valve combined with described control valve；Its
In, the oil spout action of injection valve is realized by the opening and closing of control valve.
According to a kind of embodiments possible of the application, described injection valve includes spraying valve pocket and being arranged in
Needle in injection valve pocket；High pressure when the spool of control valve is in valve opening position, in injection valve pocket
A part for fuel oil is by the valve opening inflow control valve of control valve so that before and after needle, pressure occur in both sides
Difference, this pressure reduction causes needle to be moved rearwards by and opens injection valve, it is achieved oil spout action.
According to the application, by using the valve of the revolving body form with longitudinal center's axis as the centre of gyration
Core (non-spheroidal) so that spool around central longitudinal axis, and can pass through spool and maintainance block
Between cooperation and/or valve seat between cooperation so that spool can not turn around any central transverse axis
Dynamic, even if thus spool generation erosion, also can effectively ensure that the control valve being in closed valve state
Valve opening is closed closely, and the function of control valve can reliably long sustaining.
Accompanying drawing explanation
Fig. 1 is the partial sectional schematic side view of a kind of existing control valve being used in fuel injector.
Fig. 2 is erosion and the schematic diagram of rotation of the spool explaining the control valve in Fig. 1.
Fig. 3 is the schematic diagram of the problem explaining that the spool of the control valve in Fig. 1 brings because of erosion.
Fig. 4 is the schematic cross sectional views of the fuel injector of a kind of embodiments possible according to the application.
Fig. 5-7 is all directions view of the spool of the control valve of the fuel injector in Fig. 4.
Fig. 8 is the schematic diagram of the turning power of the spool explaining the application.
Fig. 9 is the schematic diagram of the erosion of the spool explaining the application.
Figure 10-15 is the schematic diagram of some other feasible configurations of the spool explaining the application.
Detailed description of the invention
Some embodiments possible of the application are described with reference to the accompanying drawings.
The local display a kind of embodiments possible according to the application for spraying to electromotor in Fig. 4
Penetrate the ejector in the fuel injector of fuel oil, especially diesel common rail spraying system.This fuel oil sprays
Device comprises the control valve and injection valve fitted together, and such as, they can be assembled in public injection
In device housing 8 (not being shown in detail).The improvement of the application relates to control valve, therefore illustrate only control in Fig. 4
The relevant portion of valve processed.Injection valve is combined in the front side (downside in Fig. 1) of control valve, towards starting
Machine.Control valve can switch between valve opening state and closed valve state.By the open and-shut mode of control valve,
Control the oil spout action of injection valve.
This control valve has the central axis Z of longitudinal extension, and includes valve seat 1, is formed vertical in it
To the valve opening 2 extended, and the valve base cavity limited by valve seat 3 and inner peripheral surface 7.In valve opening 2
Mandrel line overlaps with longitudinal center axis Z, and the front end (lower end in Fig. 1) of valve opening 2 is passed through spray
Penetrate in the injection valve pocket of valve, rear end (upper end in Fig. 1) opens in valve base cavity.It is fed to injection
High pressure fuel in valve pocket can flow in valve base cavity through valve opening 2, it is achieved the local pressure release of injection valve pocket.
Valve seat 3 is between valve opening 2 and inner peripheral surface 7.Valve seat 3 and inner peripheral surface 7 are all taper seats,
But the tapering of valve seat 3 is more than inner peripheral surface 7.
Control valve also includes the spool 4 of the spheroid form being rotarily formed by ellipse around central axis Z,
It is positioned in valve base cavity, facing to valve seat 3 and coordinate with valve seat 3 and realize beating of valve opening 2
Open and close.The tapering of valve seat 3 contributes to the centering of spool 4.Constitute the spheroid of this spool 4
There is the short radius along longitudinal center axis Z, and along vertical with longitudinal center axis Z horizontal in
Heart axis X, the major radius (the two major radius is equal) of Y-direction, thus it is being transversely to the machine direction center
The front view (Fig. 5) that axis Z is made with in side view (Fig. 6) in identical ellipse, along
In the top view (Fig. 7) that longitudinal center axis Z is made rounded.
Control valve also includes maintainance block 5, and it is axially located in after spool 4, and is formed and spool
The tank that the profile of the Part I (substantially latter half) of 4 is corresponding, to accommodate first of spool 4
Point, the Part II (substantially first half) of spool 4 exposes and facing to valve seat 3 and valve opening 2.
These two parts of spool 4 can form one, it is also possible to is fabricated separately and is assemblied together.
Control valve also includes being arranged in valve seat 1 adapter ring 9 below and is arranged in adapter ring 9 below
Guide cylinder 10.This guide cylinder 10 includes axially extended cylindrical portion 10a and the front end from cylindrical portion 10a
The ring flange 10b extended radially outwardly, this ring flange 10b is formed multiple axially through through hole
10c。
Control valve also includes being arranged in ring flange 10b assembling sleeve 11 below, and it is by screw-threaded engagement
Or alternate manner is fixed in case of sprayer 8.Assemble and between sleeve 11 and cylindrical portion 10a, form circle
Annular space.Additionally, the front end of valve seat 1 pushes against the respective step in case of sprayer 8.So,
Valve seat 1, adapter ring 9, the assembled sleeve of guide cylinder 10 11 clamp vertically.
Control valve also includes armature core 12, and its body is axially extended cylinder, and near body
Front end formed or be assembled with radially projecting annular flange flange 12a.The body of armature core 12 is with can be axial
The mode slided is through the endoporus of cylindrical portion 10a, and annular flange flange 12a is in before ring flange 10b,
And be generally located in the inner space of adapter ring 9.Through hole 10c is by the inner space of adapter ring 9 and group
Annular space between sleeved 11 and cylindrical portion 10a connects, the inner space of adapter ring 9 again with
Valve base cavity communicates.
The front end of the body of armature core 12 fits in the rear end of maintainance block 5.The body of armature core 12
Rear end (not shown) is stretched out by the rear end of cylindrical portion 10a.Compression spring 13 is placed in assembling sleeve 11
And in the annular space between cylindrical portion 10a, and front end pushes against in the rear end face of ring flange 10b,
Rear end applies axially backward to the rear end of the body of armature core 12 by means of unshowned element or structure
Thrust.
Control valve also includes unshowned solenoid, for inducing in armature core 12 when energising
Thrust axially forward.The forward thrust that solenoid produces overcomes compression spring 13 and produces backward
Fuel pressure in thrust and valve opening 2, so that armature core 12 is positioned at the advanced potential shown in Fig. 4
Put, thus by maintainance block 5, spool 4 is pressed against on valve seat 3, to close valve opening 2, thus real
Existing closed valve state.In this position, the front end face of the rear end face of annular flange flange 12a and ring flange 10b it
Between separately a bit of axial distance.In order to clearly show that, this axial distance is exaggerated in the drawings, but real
In border, this axial distance is the least.When, after solenoid power-off, what solenoid produced pushes away forward
Power disappears, and armature core 12 is made at the fuel pressure in back pressure and valve opening 2 of compression spring 13
Move axially backward under with, connect with the front end face of ring flange 10b until the rear end face of annular flange flange 12a
Touch；Move axially backward together with armature core 12 under the spool 4 also fuel pressure effect in valve opening 2,
Thus lift off a seat face 3 and open valve opening 2, reach valve opening state.
It is its central shaft that each element of previously described control valve shows greatly vertical central axis line Z
Line.
Injection valve has the needle (not shown) being arranged in its injection valve pocket, axial by this needle
The mobile opening and closing controlling injection valve, to realize combustion oil injection.When the solenoid in control valve starts
And when making control valve be in the closed valve state shown in Fig. 4, be fed to spray the fuel oil (example in valve pocket
As from common rail) it is in pressure accumulation state, until the various piece in injection valve pocket all reaches high pressure, spray
Penetrate the needle in valve and close injection valve.Afterwards, the solenoid power-off in control valve so that control valve
Reach valve opening state, so, a part for the fuel oil in injection valve pocket in valve opening 2 inflow control valve,
The fuel pressure making needle rear portion reduces, thus pressure reduction occur in both sides before and after needle, and this pressure reduction is real
Existing needle is moved rearwards by and opens injection valve, it is achieved oil spout action.In valve opening 2 inflow control valve
Fuel oil flow through successively valve base cavity, the inner space of adapter ring 9, through hole 10c, assemble sleeve 11 with
Annular space between cylindrical portion 10a, and return to fuel tank.Afterwards, the electromagnetism in control valve
Coil is again started up so that control valve reaches closed valve state again, thus is switched to pressure accumulation in injection valve
State, until pressure at both sides is identical before and after needle, now needle is closed under the effect of its reset element
Injection valve.Then oil spout action next time can be carried out.
In previously described example, produced by solenoid and armature core 12 and act on maintainance block 5
Forward thrust.It is appreciated that, it is also possible to the force application mechanism taken other form is executed to maintainance block 5
Add thrust forward, so that spool 4 pushes against closes valve opening 2 in valve seat 2.
Additionally, in previously described example, make armature core 12 reset by compression spring 13 and solve
Except the forward thrust being applied to maintainance block 5.It is appreciated that, it is also possible to the reset machine taken other form
Structure forces force application mechanism to back to it in situ the face 3 so that spool 4 can be lifted off a seat and open valve
Hole 2.
In addition it should be pointed out that, owing to there is oil film between armature core 12 and maintainance block 5, and keep
Block 5 is always subjected to the fuel pressure (directly, or being delivered to maintainance block 5 from spool 4) from valve opening 2,
Therefore, when armature core 12 moves, maintainance block 5 always keeps fitting with armature core 12.In order to ensure
Being properly positioned therebetween, can arrange the location structure of form fit in interface between.
As shown in Figure 8, ellipse for be rotarily formed around longitudinal center axis Z due to the spool 4 of the application
Spheroid, and maintainance block 5 are provided with the tank for accommodating its Part I with its form fit,
Therefore it has the ability slowly rotated around longitudinal center axis Z relative to maintainance block 5 and valve seat 1,
As shown by the arrow, but can not around its two central transverse axis X, Y rotate.
When control valve changes to valve opening state from closed valve state, along with spool 4 leaves valve axially backward
Seat surface 3, the high pressure fuel introduced from injection valve through valve opening 2 can impact spool 4 with the form of jet flow.?
In long period of operation, the fuel oil of the gaseous form in this jet flow, mainly jet flow, spool 4 can be caused
Produce cavitation corrosion position 6 facing to the part erosion of valve opening 2, see Fig. 9.But, due to spool 4 not
Can rotate, therefore, even if spool 4 turns around longitudinal center axis Z around its central transverse axis X, Y
Dynamic, this cavitation corrosion position 6 is always facing to valve opening 2, without arriving the position in the face of valve seat 3.This
Sample, even if spool 4 creates cavitation corrosion position 6, is also not result in valve opening 2 close bad.Additionally, around
This of the spool 4 of the spheroid form of longitudinal center axis Z can only rotate around longitudinal center axis Z
Ability the contact site between itself and valve seat 3 is held circular at, it is thereby advantageously ensured that control
The valve processed closing under closed valve state, the function of control valve will not decline.
In the example of spool 4 described above, by spool 4 and the maintainance block 5 of spheroid form
Between cooperation, eliminate the spool 4 turning power around its any central transverse axis.It is appreciated that
Spool 4 can also use other revolving body form, to realize same function.
Such as, in the embodiments possible shown in Figure 10, spool 4 from in maintainance block 5
The Part I of semiellipsoid form and the Part II group of semicircle spherical form exposed from maintainance block 5
Conjunction forms, and the two part is all with longitudinal center axis Z as the centre of gyration.By semiellipsoid form
Part I and in maintainance block 5 coupling tank between coordinating so that spool 4 has around longitudinal direction
The turning power of central axis Z but not there is the turning power around any central transverse axis.
In the embodiments possible shown in Figure 11, spool 4 from in maintainance block 5 butt circle
The Part I of conical form and the Part II combination of semicircle spherical form exposed from maintainance block 5 and
Becoming, the two part is all with longitudinal center axis Z as the centre of gyration.By frusto-conical form
Coordinating between Part I and the coupling tank in maintainance block 5 so that spool 4 has in longitudinal direction
The turning power of mandrel line Z but not there is the turning power around any central transverse axis.
In the embodiments possible shown in Figure 12, spool 4 from cylinder in maintainance block 5
The Part I of form and the Part II of semicircle spherical form exposed from maintainance block 5 combine,
The two part is all with longitudinal center axis Z as the centre of gyration.By the Part I of cylinder form
And coordinating between the coupling tank in maintainance block 5 so that spool 4 has around longitudinal center axis Z
Turning power but not there is the turning power around any central transverse axis.
There is other shape (including combined shaped) of Part I of above-mentioned functions it is further envisaged that go out
Come.
As previously described by coordinating between spool 4 with maintainance block 5 (static cooperation can be referred to as,
Because the mated condition between spool 4 and maintainance block 5 always maintains) elimination spool 4 is around laterally
The replacement of the scheme of center axis thereof ability, can pass through coordinating between spool 4 with valve seat 3
(dynamic fit can being referred to as, closing because occurring over just control valve coordinating between spool 4 with valve seat 3
Time) eliminate spool 4 around central transverse axis turning power.Such as, in the feasible enforcement shown in Figure 13
In mode, the Part I in maintainance block 5 that coordinates of spool 4 is semicircle spherical form, from holding
The main body of the Part II that block 5 exposes is generally cylindrical body, but at front periphery, (face of cylinder is with smooth
Front end face between intermediate location) form taper seat part 4a, the tapering of its tapering and valve seat 3
Equal, constitute and contact the position sealed with valve seat 3.When control valve is closed, maintainance block 5 is by electricity
The thrust axially forward that magnetic coil induces in armature core 12 is delivered to spool 4, with by spool 4
Pressure presses against on valve seat 3, coordinating so that spool 4 between taper seat part 4a with valve seat 3
Automatic centering.So, micro-around any central transverse axis of spool 4 any presumable can be eliminated
Amount rotates, thus the position of the facing valve opening 2 of spool 4 will not transversely misplace.
In the embodiments possible shown in Figure 14, spool 4 coordinate in maintainance block 5 first
It is divided into semicircle spherical form, the form that Part II is substantially cone exposed from maintainance block 5.This
Outward, the tapering at the position that the Part II with spool 4 of valve seat 3 is corresponding is modified to and spool 4
The tapering of Part II equal.So, corresponding with valve seat 3 by the Part II of spool 4
Dynamic fit between position, it is achieved spool 4 automatic centering, may have eliminating any of spool 4
The minor rotation around any central transverse axis.
There is other shape (including combined shaped) of Part II of above-mentioned functions it is further envisaged that go out
Come, thus design various by the dynamic fit between spool 4 and valve seat 3 prevent spool 4 around
The scheme of the rotation of central transverse axis.In this case, spool 4 is around longitudinal center axis Z's
Turning power was still from coordinating in fact between the Part I of spool 4 and the coupling tank in maintainance block 5
Existing.
Also, it is contemplated that can be by the static coordinated scheme between spool 4 and maintainance block 5 and valve
Between core 4 and valve seat 3 dynamic fit scheme combination, avoid spool 4 around transverse central axis
The rotation of line.Such as in the embodiments possible shown in Figure 15, the cooperation of spool 4 is at maintainance block 5
In Part I be frusto-conical form (being similar in Figure 11), expose from maintainance block 5
The main body of Part II is generally cylindrical body, but forms taper seat part 4a at front periphery and (be similar to
In Figure 13).So, the static state between Part I and the maintainance block 5 of available spool 4 coordinates
Elimination spool 4, around the turning power of any central transverse axis, utilizes Part II and the valve of spool 4
Cooperation between seat surface 3 gives spool 4 automatic centering function, prevent further its around any laterally in
Mandrel line rotates.Other combination coordinated scheme is it is further envisaged that out.
It can be seen that by the valve using the revolving body form with longitudinal center axis Z as the centre of gyration
Core 4 so that it is (this assembling being control valve and operation provide to have the ability around central longitudinal axis
Motility), but spool 4 in the longitudinal section comprising described longitudinal center axis Z in non-circular, and
And by coordinating between spool 4 with maintainance block 5 (static coordinate) and/or and valve seat 3 between
Coordinate (dynamic fit) so that spool 4 is prevented from around the rotation of any central transverse axis.So,
The position of the facing valve opening 2 of spool 4 keeps the most transversely misplacing, from facing without being displaced to
The position of valve seat 3.Even if the position of the facing valve opening 2 of spool 4 occurs erosion, spool 4 is also
Can effectively ensure that the valve bore closure of the control valve being in closed valve state, the function of control valve can
By ground long sustaining.This makes the life-span of control valve or even whole fuel injector to extend.
Although describing the application herein with reference to specific embodiment, but scope of the present application being not
It is confined to shown details.In the case of without departing from the ultimate principle of the application, can be thin for these
Joint makes various amendment.
Claims (10)
1. it is used in the control valve in fuel injector, including:
Valve seat (1), it limits valve seat (3) and the valve along longitudinal break-through valve seat (3) center
Hole (2), described valve opening (2) and valve seat (3) limit longitudinal center's axis (Z), and institute
State valve opening (2) to communicate with the injection valve of fuel injector；
Spool (4), its be configured to be suitable to along described longitudinal center axis (Z) in valve closing position and
Valve opening moves between position, and in valve closing position, spool (4) contacts cooperation and closes with valve seat (1)
Valve opening (2), in valve opening position, spool (4) is lifted off a seat (1) and is opened valve opening (2)；With
And
Maintainance block (5), it has tank, in order to keep spool (4)；
Wherein, spool (4) is with described longitudinal center axis (Z) revolving body as the centre of gyration,
Its in the longitudinal section comprising described longitudinal center axis (Z) in non-circular so that spool (4) energy
Enough around described longitudinal center axis (Z) rotation, but can not hang down around with described longitudinal center axis (Z)
Straight any central transverse axis (X, Y) rotates.
2. control valve as claimed in claim 1, wherein, described spool (4) includes being contained in described
Part I in tank and the Part II exposed from maintainance block (5), and by Part I with
The form fit of tank makes spool (4) can rotate around described longitudinal center axis (Z).
3. control valve as claimed in claim 2, wherein, also by described Part I and tank
Form fit make spool (4) can not around vertical with described longitudinal center axis (Z) any laterally
Central axis (X, Y) rotates.
4. control valve as claimed in claim 2 or claim 3, wherein, by described Part II and valve seat
The form fit in face (3) makes the spool (4) can not be around vertical with described longitudinal center axis (Z)
Any central transverse axis (X, Y) rotates.
5. the control valve as according to any one of claim 1-4, wherein, described spool (4) is ellipse
Spheroid, have along described longitudinal center axis (Z) short radius and along and described longitudinal center axis
(Z) major radius in vertical central transverse axis (X, Y) direction.
6. the control valve as according to any one of claim 1-5, also includes force application mechanism, is used for selecting
Apply thrust to maintainance block (5), to move to by maintainance block (5) band movable valve plug (4) to selecting property
Valve closing position.
7. control valve as claimed in claim 6, also includes resetting-mechanism, is used for making force application mechanism edge
The direction contrary with its force direction to return in situ.
Control valve the most as claimed in claims 6 or 7, wherein, by the spray introduced by valve opening (2)
The high pressure fuel penetrated in valve pocket shifts spool (4) onto valve opening position from valve closing position.
9. a fuel injector, especially co-rail ejector, including:
Control valve as according to any one of claim 1-8；And
The injection valve combined with described control valve；
Wherein, the oil spout action of injection valve is realized by the opening and closing of control valve.
10. fuel injector as claimed in claim 9, wherein, described injection valve includes spraying valve pocket
With the needle being arranged in injection valve pocket；
When the spool (4) of control valve is in valve opening position, of the high pressure fuel in injection valve pocket
Divide by valve opening (2) inflow control valve of control valve so that before and after needle, pressure reduction occur in both sides, should
Pressure reduction causes needle to be moved rearwards by and opens injection valve, it is achieved oil spout action.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510387784.2A CN106321307B (en) | 2015-07-03 | 2015-07-03 | Fuel injector and control valve therefor |
| EP16170837.5A EP3112663B1 (en) | 2015-07-03 | 2016-05-23 | Fuel injector and control valve thereof |
| JP2016128246A JP6824645B2 (en) | 2015-07-03 | 2016-06-29 | Fuel injection system and its control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510387784.2A CN106321307B (en) | 2015-07-03 | 2015-07-03 | Fuel injector and control valve therefor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106321307A true CN106321307A (en) | 2017-01-11 |
| CN106321307B CN106321307B (en) | 2020-03-06 |
Family
ID=56068782
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510387784.2A Active CN106321307B (en) | 2015-07-03 | 2015-07-03 | Fuel injector and control valve therefor |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3112663B1 (en) |
| JP (1) | JP6824645B2 (en) |
| CN (1) | CN106321307B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102022211537A1 (en) * | 2022-10-31 | 2024-05-02 | Robert Bosch Gesellschaft mit beschränkter Haftung | Proportional control valve for controlling a gaseous fuel in a fuel supply system of an internal combustion engine, pressure control unit and fuel supply system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5803369A (en) * | 1995-07-26 | 1998-09-08 | Nippondenso Co., Ltd. | Accumulator fuel injection device |
| JP2002364483A (en) * | 2001-06-07 | 2002-12-18 | Denso Corp | Fuel injection system |
| JP2008175085A (en) * | 2007-01-16 | 2008-07-31 | Denso Corp | Pressure limiter of fuel injection system |
| DE102008041362A1 (en) * | 2008-08-20 | 2010-02-25 | Robert Bosch Gmbh | Fuel supplying device for internal combustion engine in motor vehicle, has dosing valve and pressure control valve comprising closing members, which are connected together in rigid manner and are movable on corresponding movement axis |
| FR2973092A1 (en) * | 2011-03-25 | 2012-09-28 | Bosch Gmbh Robert | Sealing device for pressure regulator used in high-pressure diesel injection device of diesel engine of e.g. car, has rod for hermetically applying ball on seat and comprising cavity to laterally guide ball with respect to axis of seat |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102004049288A1 (en) * | 2004-10-09 | 2006-04-20 | Robert Bosch Gmbh | Fuel injector with molded valve seat to reduce the anchor stroke |
| JP2006291856A (en) * | 2005-04-12 | 2006-10-26 | Denso Corp | Fuel injection valve |
| JP2009030563A (en) * | 2007-07-30 | 2009-02-12 | Denso Corp | Injector |
| DE102008001597A1 (en) * | 2008-05-06 | 2009-11-12 | Robert Bosch Gmbh | Fuel injector |
-
2015
- 2015-07-03 CN CN201510387784.2A patent/CN106321307B/en active Active
-
2016
- 2016-05-23 EP EP16170837.5A patent/EP3112663B1/en active Active
- 2016-06-29 JP JP2016128246A patent/JP6824645B2/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5803369A (en) * | 1995-07-26 | 1998-09-08 | Nippondenso Co., Ltd. | Accumulator fuel injection device |
| JP2002364483A (en) * | 2001-06-07 | 2002-12-18 | Denso Corp | Fuel injection system |
| JP2008175085A (en) * | 2007-01-16 | 2008-07-31 | Denso Corp | Pressure limiter of fuel injection system |
| DE102008041362A1 (en) * | 2008-08-20 | 2010-02-25 | Robert Bosch Gmbh | Fuel supplying device for internal combustion engine in motor vehicle, has dosing valve and pressure control valve comprising closing members, which are connected together in rigid manner and are movable on corresponding movement axis |
| FR2973092A1 (en) * | 2011-03-25 | 2012-09-28 | Bosch Gmbh Robert | Sealing device for pressure regulator used in high-pressure diesel injection device of diesel engine of e.g. car, has rod for hermetically applying ball on seat and comprising cavity to laterally guide ball with respect to axis of seat |
Also Published As
| Publication number | Publication date |
|---|---|
| EP3112663B1 (en) | 2018-09-12 |
| CN106321307B (en) | 2020-03-06 |
| EP3112663A1 (en) | 2017-01-04 |
| JP6824645B2 (en) | 2021-02-03 |
| JP2017040254A (en) | 2017-02-23 |
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